Tycherobius Bolland

Fan, Qing-Hai & Walter, David E., 2006, A review of the genus Tycherobius (Acari: Camerobiidae), with descriptions of four new species from Australia, Zootaxa 1121, pp. 1-52 : 3

Genus Tycherobius Bolland

Tycherobius Bolland, 1986: 205 ; Ayyıldız & Doğan 2003: 883; Fan & Zhang, 2005: 25.

Type species: Neophyllobius lombardinii Summers & Schlinger, 1955 , by original designation.

Diagnosis (Based on Fan & Zhang 2005)

Female. Peritremes with 1–3 loops; each side with 1–3 branches. Counts of setae and solenidia from palptrochanter to palptarsus: 0, 2, 1, 3 + 1 claw, 1–2 setae + 1–2 eupathidia + 1 solenidion. Idiosoma with 14–15 pairs (0, a single or a pair of pdx present) of lanceolate, palmate, clavate or peg­like setae. Solenidia on tarsi I and II situated on basal halves. Tarsi I and II each with 2 medio­ventral setae (not placed in a lingitudinal line) and III and IV each with 1 medio­ventral seta. Counts of setae and solenidia on legs I–IV: coxae (excluding 1a, 3a, and 4a) 2 + 1 elcp, 1, 2, 2; trochanters 1, 1, 1, 1; femora 3–4, 3–4, 2–3, 2; genua 1 + 1, 1 + 1, 1, 1; tibiae 9 + 1, 8 + 1, 7 + 1, 7 + 1; tarsi 8–10 + 1, 8– 10 + 1, 7, 7.

Male. Hysterosoma somewhat tapered; genital and anal opening fused, bearing 4 pairs of setae; aedeagus present; number of setae and solenidia on leg I–IV as in female except tibia I with an additional long distal solenidion and each tarsus with an enlarged or elongate solenidion.

Remarks

There are only a few distinct characters for separating species, such as the presence of setae pdx, the number of setae and solenidia on the palptarsus, the number of setae on femora I–IV, tibia III and tarsi I–II, and the structure of peritremes. For most of species we need to rely on the relative length of idiosomal setae. Comparative characters of known species are listed in Table 1 and Table 2 .

In the 12 known and 4 presently described species, the adult female is known in 13 (81.3%), only the adult male in 3 (18.8%), and 4 (25.0%) are known from both sexes (Table 3). Deutonymphs are unknown.